package slangc.model;

import slang.data.Mappable;

public class TemplateArguments implements Mappable {
	private TemplateArgument[] arguments;
	public TemplateArguments(TemplateArgument[] arguments) {
		this.arguments = arguments;
	}
	
	public int countArguments() {
		return arguments.length;
	}
	
	public TemplateArgument getArgument(int i) {
		return arguments[i];
	}
	
	@Override
	public String toString() {
		String result = "";
		
		for(int i = 0; i < arguments.length; i++) {
			TemplateArgument t = arguments[i];
			if (result.ints().length != 0) {
				result += ",";
			}
			result += t.toString();
		}
		
		return "<" + result + ">";
	}
	
	public String genericString() {
		String result = "";
		
		for(int i = 0; i < arguments.length; i++) {
			TemplateArgument t = arguments[i];
			if (result.ints().length != 0) {
				result += ",";
			}
			result += "?";
		}
		
		return "<" + result + ">";
	}

	@Override
	public int mappableHash() {
		final int prime = 31;
		int result = 1;
		result = prime * result + arrHash(arguments);
		return result;
	}

	@Override
	public boolean mappableEquals(Mappable obj) {
		if (this == obj) {
			return true;
		}
		if (!(obj instanceof TemplateArguments)) {
			return false;
		}
		TemplateArguments other = (TemplateArguments) obj;
		if (!arrEquals(arguments, other.arguments)) {
			return false;
		}
		return true;
	}
	
	public boolean arrEquals(TemplateArgument[] a, TemplateArgument[] b) {
		if (a.length != b.length) {
			return false;
		}
		for (int i = 0; i < a.length; i++) {
			if (!a[i].mappableEquals(b[i])) {
				return false;
			}
		}
		return true;
	}
	
	public int arrHash(TemplateArgument[] a) {
		int hash = 0;
		for (int i = 0; i < a.length; i++) {
			hash += a[i].mappableHash();
		}
		return hash;
	}
	
}